【正文】
參考文獻(xiàn): [1] 鄒應(yīng)全 .《 51 系列單片機(jī)原理與實(shí)踐教程》 .西安電子科技大學(xué)出版社 [2] 閻石 .《數(shù)字電子技術(shù)基礎(chǔ)》 .高等教育出版社 [3] 何立民 .《單片機(jī)初級教程》 .北京航空航天大學(xué)出版社 9 123456ABCD654321D C B ATitleNumberRevisionSizeBDate:5Jun2010 Sheet of File:C:\Program Files\Design Explorer 99 SE\Library\Sim\MyDesign.ddbDrawn By:EA/VPP31RST9XTAL119XTAL218P(WR)16P39P(RD)17P38P(INT1)13P37P(INT0)12P36P(T1)15P35P(T0)14P34PSEN29P33ALE/PROG30P32P(RXD)10P21P(TXD)11P22P(SCK)8P23P(MISO)7P24P(MOSI)6P25P5P26P4P27P3P28P(T2EX)2P(T2)1VCC40GND2089S5230p30pVCC22u1kVCC100NPNVCCS1 S2 S31kA1B2C3G2A4G2B5G16Y77Y69Y510Y411Y312Y213Y114Y01574LS138abfcgdeDPY[LEDgn]1 2 3 4 5 6 7a b c d e f gY7abfcgdeDPY[LEDgn]1 2 3 4 5 6 7a b c d e f gY6abfcgdeDPY[LEDgn]1 2 3 4 5 6 7a b c d e f gY5abfcgde